Well-drilling bit



Ami m5, m5.

H. WICKERSHAM WELL DRILLING BIT Filed June 9. 1924 nu 3 To Y H 4 ff 4 M 4 Mv Patented Apr. lll., 1925.,

.aras

' ldddltiii rar ai Wntnnnrnmno nir.

Application filed June 9,

i o r/Z vivio/a it 'may foncer-,

lle it known that l, HARRY P. Nieman- .snnin a citizen of the United States, resii dent of `Walnut Park. county of Los Ange les, State of California, have invented new and useful Improvements in Well-Drilling Bits, of which the following is a. full, clear, and accurate description.

This invention has to do with a well drilling,r bit, and it is an object of the invention to provide a bit which is simple and efective.

rllhis invention is particularly applicable to disk and roller hits, and has particular reference to a disk or roller mounting. Throughout this application reference will. be had to a bit of the disk type` and I will describe a forni of mounting embodying the present invention particularly suited for a disk; it being understood that such refe-rence is had for purpose of facilitating a full and accurate understanding of the invention, and is not intended to limit or restrict the scope ofthe invention to such specific application.

An object of this invention is to provide a mounting for a disk, or the like, which is simple, effective tand secure.

Another object of the invention is to provide a mounting of the character specified, which is compact and does not present projecting or protruding arts apt to be inj ured or to interfere with the operation o1" the bit.

Another object of this inventionis to provide a mounting of the character specified, which is simple, quick and convenient to manipulate.

The wai-ions objects and features of this invention will be best and more fully understood from the following detailed description ofa typical forni and application of the invention throughout which description reference is had to the accompanying drawings in which Fig. 1 is a side elevation of a simple forni or bit of the disk type embodying the present invention.

Fig. 2 is a. View of the bit shown in Fig. 1 taken as indicated by line 2-2 on Fig. 1.

Fig. 3 is an enlarged detailed sectional view of the mounting provided by this nvention being a view taken as indicated by line 3-3 on Fig. 1, and 1 Fig. 4 is a'viewsbowing a wrench suitable 1924. Serial No. 718,849.

for use in operating the construction provided by lthis invention.

The bit illustrated in the drawings is a simple and typical forni and type of hit io which the present invention can be adv-.in-

tageously applied. teornpriscs, generally,

ya body 1() and disk cutters 11 carried at the lower end of the body so that theyproject therefrom, and will op rate to out a. hole when the bit is rotated. The body 1f.) is ofA a general forni and construction conunon to bits of this genenal character, and includes a tapered screw threaded shank 1,2 at its upper end, and a pluralityY of downwardhI extending legs or projections 13 und 111 et its lower end. 4The shank 12 is providi-vd on the bodjv `for mounting it on or connecting it to a suitablestringof drill pipe, or the like. The projections 13 and 14 are for the purpose of carrying the disk 11, and in the present form of bit, Where there are two disks, there is a center projectionv 13. and

outer projections 14: at opposite sides of the center projection 13. The general arrangement and relationing of the projections is clearly illustrated in Figs. l and 2 of the drawing. lt is to he noted that the outer projections 14 inA addition to being at opposite sides of the center projection 13 are staggered or olf-set relative to each other.

The disk cutters 11, which may ho con structed and shaped in various manners, are arnanged between the projections 13' and 14; and are rotatably carrie/d on pins 15. The pins 15 extendbetween and are carried by the projections 13 and 14.

In accordance with this invention cach mounting pin 1.5 is provided at one end with screw threads 16 and at the other end with an enlargement or head 17. The screw threaded end of the pin 15 is adapted to screw thread into the opening so that the head 17 seats in the bottom of the enlarged outer portion 19 of an opening 2O formed through the other projection. In the present case I have illustrated the opening 18, in

the center projection 13 and have shown it extending completely through the projection. 'FThe opening 20 is in the other or outer projection and its enlarged outer portion -19 is made to more or less accurately fit or carry the head and portion of the pin in the manner clearly illustrated in Fig. 3. The head 12 of the pin is round to t the portion 19 of the opening 20,'. and is preferably madecomparatively thin, consistent with strength and durability, sothat it occopies only the bottom or inner part of the portion 19. The pin is arranged in and l removed from position through the opening 20 and is provided at either or both ends with means whereby it can be engaged for the purpose of rota-ting it to screw it into and out of the opening 18. In practice this means may be in the form of an irregular or polygonal socket 21 shown in the drawings in the threaded end of the pin. The enlarged outer portion 19 'of the opening 20 is screw threaded and a lock bolt 22 is provided to screw thread into it'over the head 17 of the pin. The plug 22 is adapted to be tightened into 'the portion 19 s0 that it bearsl or clamps tightly on the head 17 to lock or secure the pin in place. The plug may, in practice, be made sufficiently thin to be completely carried in the portion 19 when in place to lock the pin. 'With this arrangement it is necessary to provide the plug with means whereby it can be engaged for purpose of operating it. -This means may comprise an irregular lor polygonal socket 24- in the outer end of the plug. In practice the screw threads in the opening 18 and those in the portion 19 of the opening 2O may be opposite, that is, in one case left-handed and the othercase right-handed thus further preventing the possibility of the mounting becoming loose.

The rneans or preventing rotation .between the plug and pin so that the pin cannot work oo se. ln its preferred form this means includes a bolt pr plunger 40 carried by the pin to cooperate with an opening 41 inthe plug. The plunger'd() is noncircular in cross sectional configuration and is provided at its inner end with a head 42. The plunger is carried in a recess 43 in/the head end of the pin and is retained in the recess and held inst rotation by a retaining member 44 fixed in the outer part of the recess. A s rin 45 is Narranged in the recess behind tiie 'plunger to normally hold it in van out position where-` its outer end projects v1li-rom the head of the pin. The openin 41 in the plug is shaped to correspond to t e plunger and is located to receive the plunger as shown in Fig. 3. The opening 41 extends throu h the plug and opens into the socket 24. lhan the plunger is in the openingin the plug theI pin and plug are locked to: gather against-relative rotation. When the' plug is being arranged in or removed from the portion 19 of the opening 20 the plunger is depressed. ln practice a wrench such as4 ia shown in Fig. t canV 'be `advanil'ageously uiod for this purpose. This wrench has a hoed adapted to fit the socket in the plug and has a projection 51' to exten resent invention further provides into the opening 4l to displace the plunger therefrom. 4 y y The disk l is provided with a central. opening 25 to receive or pass the pin l5 so that the disk is rotatable on the pin.v in practice it is desirable to provide suitable Washers 26 on the pin at either side of the disk in a manner suc-h as is illustrated in Fig. 3 of the drawings. The washers o crate to take the weer that comes upon the pats and to properlyv space the disk in the To mount the disk 1l it is arran ed in position between the projections and tie pin 15 is arranged in place between the pron jections and through the disk through the opening 20. When the pin has been tightly screw threaded into the opening 18 the plug 22 is tightened against the head 17 locking the pin so that the bit is ready 'for operation. To remove the disk it is merely necessary to remove the plug 22, and then the pin 15.

lt is to be particularly noted that i have by my present invention provided a mountn ing suitable for a disk, a roller, or like device, Which is extremely simple, inexpensive, strong and durable, and is convenient and simple to manipulate. l have further provided a mounting which is particularly compact, and in which there are no parts protruding or projecting in a manner to become worn through operation of the bit, to become broken ofi, orto interfere with proper circu lation or operation of the bit, etc.

Having described oni a typical preferred form ofmyin-vention, 'do not wish to limit myself to the s eciiici details hereinabove set forth but wis to reserve to myself any changes-or variations that may appear to those skilled in the art or fall within the scope of the following claims.

Having described a preferred form of my invention, l claim:

l. In la bit having two spaced parts with ""openings at opposite points, a cutting member, and a. pin for mounting the cutting member between said parte, the pin being arranged to extend between `the parte and having one end screw threaded into the opening in one part, 1ahead on the other end of the pin completely carried in the opening in the other part, `and a'plug screw threaded into said last mentioned opening over the head of the pin.` v y 2. ln a bit having two spaced' parts having openings` at opposite points, a cutting member, and `a pin for mounting the cutting member between said parte, the pin extending between the parte and having one end screw threaded into the opening in one of said parts, a shoulder in the opening inthe.

other of said parte, e head on, the pin carriedin the last mentioned opening themshoulder, and a plug screvvthrea edrin the lost mentioned opening over the head.

3. In a bit having two spaced parts with openings at opposite points, a cutting member, and a pin for mounting the cutting member between said parts, screw threads on the pin to engage the opening in one part, a head on the other end of the pin oompletely carried in the opening in the other part a plug screw threaded into the last mentioned openingA over the head, the threads on the pin and plug being opposite.

4. In 'a bit havingutwo spaced parts with openings at opposite points, a cutting member, and a. pin for mounting the cutting member between said parts, the pin being arranged t0 extend between .the paits, screw threads on one end of the pin to engage the opening in one part, a head on the other end of the pin completely carried in the openc ing in the other part, and a plug screw threaded into said last mentioned o ening over the headof the pin, the ends of t e pin and the plug being completely within said parts.

5. In labit having two spaced parts with openings at opposite points, a cutting member, and a'pin for mounting the cutting membei betweensaid parts, the pin being arranged to extend between the parts and having one end screw threaded into the opening in one part and having a bead on its other end completely carried in the opening in the other part,

a plug screw threaded into said last mentioned opening over the head of the pin, and means at the screw threaded endv of of the plug whereby they cfa-n be engaged for rotation.

(i. In abit having two spaced parts with openings at opposite points, and a cutting member', a pin for mounting the cutting member between said parts, the pin being arranged to extend between the parts and having oneend screw threaded into the opening in one part and having a head 0n its other end completely carried in the opening in the other part, and a plug screw threaded into said ylast mentioned opening over the head of the pin, and means for pre- 4venting relative rotation between the plug and pin.

7. 'In' a bit having two spaced parts with openings at opposite points.- a cutting member, and'fa pin for mounting the cutting member between said parts, the pin being the pin and the outer end arranged to extend between the parts one end of the pin to engage the opening in one part, and, a plug screw threaded in the opening in the other part over the pin, 'the threads on the pin and plug being of dif ferent pitch.

8. In a bit having two spaced parte with openings at opposite points, a cutting member, and a pin for mounting the cutting member between said parts, the pin being arranged to extend between the parte and having one end screw threaded into the ,opening in one part having a head on its other end completely carried in the opening in the other part, and a plug screw threaded into said last 'head of the pin, and a releasable connection between the pin and plug to prevent relative. rotation between them.

9. .In a bit having two spaced parts with openings at opposite points, a cutting meinr, and a pin for mounting the cutting member between said parts, the pin being arranged to extend between the parte and having one end screw threaded into the opening in one part and heaving Ia head on its other end completely carried in the opening in the other part, a plug screw threaded into said last mentioned opening over the the plug having an open ing through it, and a releasable connection between the pin and plug preventing rch tive rotation between them and operable thr'ough the opening in the plug.

l0. In a bit having two spaced parts with openings at opposite points, a cutting member, land a pin for mounting the cutting member between said parts, the. pin being arranged to extend between the parts and having one end screw threadid into the opening in one part and having a. bead on its other end completely carried in the opere ing in the other part, a 'plug screw threaded into Said last mentioned opening over the head of the pin, the plugr having an opening through it. and a. plunger norniallj,y yieldingly extending from the pin 'to cooperate with the opening in the plug to pre vnt relative rotation between the pin and p ug.

In witness that I claim Vthe oreffoiinlr I -have hereunto subscribed my name this second day of June 1924.

HARRY P. WICKERSHM.

mentioned opening over the 

